The DT LMS – elearning, WordPress LMS plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on multiple AJAX handlers (including dtlms_save_poc_settings, dtlms_save_skin_settings, and dtlms_save_options_settings) in versions up to, and including, 1.1. These handlers are registered on the wp_ajax_nopriv_* hook and contain no capability check, no nonce verification, and pass user-supplied data directly to update_option(). This makes it possible for unauthenticated attackers to overwrite arbitrary plugin option values stored in the wp_options table, including Point-of-Contact email configuration and skin/branding settings, which can be used to alter the appearance and behavior of the LMS for all site visitors.
Weakness
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Potential Mitigations
- Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) [REF-229] to enforce the roles at the appropriate boundaries.
- Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- For example, consider using authorization frameworks such as the JAAS Authorization Framework [REF-233] and the OWASP ESAPI Access Control feature [REF-45].
- For web applications, make sure that the access control mechanism is enforced correctly at the server side on every page. Users should not be able to access any unauthorized functionality or information by simply requesting direct access to that page.
- One way to do this is to ensure that all pages containing sensitive information are not cached, and that all such pages restrict access to requests that are accompanied by an active and authenticated session token associated with a user who has the required permissions to access that page.
Related Attack Patterns
References
- https://plugins.trac.wordpress.org/browser/dt-lms-lite/trunk/settings/settings-poc-utils.php#L102
- https://plugins.trac.wordpress.org/browser/dt-lms-lite/trunk/settings/settings-poc-utils.php#L97
- https://plugins.trac.wordpress.org/browser/dt-lms-lite/trunk/settings/settings-utils.php#L15
- https://plugins.trac.wordpress.org/browser/dt-lms-lite/trunk/settings/settings-utils.php#L53
- https://plugins.trac.wordpress.org/browser/dt-lms-lite/trunk/settings/settings-utils.php#L59
- https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3585901%40dt-lms-lite\u0026new=3585901%40dt-lms-lite
- https://www.wordfence.com/threat-intel/vulnerabilities/id/fe5bd645-0707-43ce-9316-d52f60035754?source=cve